Toothbrush



FIG. 1 is a top plan view of a toothbrush, showing my new design;

FIG. 2 is a front elevational view thereof, the rear being a mirrorimage;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a left side elevational view thereof; and,

FIG. 5 is a right side elevational view thereof.

The ornamental design for a toothbrush, as shown and described.